xref: /netbsd-src/external/gpl3/gcc/dist/libstdc++-v3/include/ext/new_allocator.h (revision 0a3071956a3a9fdebdbf7f338cf2d439b45fc728)
1 // Allocator that wraps operator new -*- C++ -*-
2 
3 // Copyright (C) 2001-2022 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library.  This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file ext/new_allocator.h
26  *  This file is a GNU extension to the Standard C++ Library.
27  */
28 
29 #ifndef _NEW_ALLOCATOR_H
30 #define _NEW_ALLOCATOR_H 1
31 
32 #include <bits/new_allocator.h>
33 
_GLIBCXX_VISIBILITY(default)34 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
35 {
36 _GLIBCXX_BEGIN_NAMESPACE_VERSION
37 
38   /**
39    *  @brief  An allocator that uses global `new`, as per C++03 [20.4.1].
40    *  @ingroup allocators
41    *
42    *  This is precisely the allocator defined in the C++ Standard.
43    *    - all allocation calls `operator new`
44    *    - all deallocation calls `operator delete`
45    *
46    *  This is a non-standard extension that can be used to guarantee
47    *  allocation from `new` even if the library has been configured to
48    *  use a different implementation for `std::allocator`.
49    *
50    *  @tparam  _Tp  Type of allocated object.
51    *
52    *  @headerfile ext/new_allocator.h
53    */
54   template<typename _Tp>
55     class new_allocator : public std::__new_allocator<_Tp>
56     {
57     public:
58 #if __cplusplus <= 201703L
59       template<typename _Tp1>
60 	struct rebind
61 	{ typedef new_allocator<_Tp1> other; };
62 #endif
63 
64       new_allocator() _GLIBCXX_USE_NOEXCEPT { }
65 
66       new_allocator(const new_allocator&) _GLIBCXX_USE_NOEXCEPT { }
67 
68       template<typename _Tp1>
69 	new_allocator(const new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }
70     };
71 
72 _GLIBCXX_END_NAMESPACE_VERSION
73 } // namespace
74 
75 #endif
76